#33126 [NEW]: foreach array pointer behavour is inconsistent on variables vs. references

From: php at com dot jkkn dot dk Operating system: FreeBSD PHP version: 5.0.4 PHP Bug Type: Arrays related Bug description: foreach array pointer behavour is inconsistent on variables vs. references Description: ------------ When nesting foreach's on the same variable OR using it together with array_next() gives inconsistent behavour. When you use foreach() on the same variable within another foreach() you would expect either of two different behavours. Either: A) They would share the same array pointer. B) They would each have their own pointer Documentation says method A is in use... but not always it seems. Confirmed on PHP 5.0.4 and PHP 4.3.8 that this behavour is inconsistent. Below is provided two examples which show that foreach will act in two different ways when used on a by-ref variable or a normal variable. Reproduce code: --------------- / EXAMPLE 1: $numbers = range(1, 10); function printNumbers() { global $numbers; foreach ($numbers as $number) { echo $number . ', '; } } //$numbers =& $numbers; //<---- by reference (var.name does not matter) provides alternative behavour foreach ($numbers as $number) { echo $number . ": "; printNumbers(); echo "\n"; } // EXAMPLE 2: $numbers = range(1, 10); foreach ($numbers as $skip) { echo $skip . ','; next($numbers); } echo "\n"; // alternative behavour when using by-reference $numbers2 =& $numbers; foreach ($numbers2 as $skip) { echo $skip . ','; next($numbers2); } Expected result: ---------------- The code should show the same result if iterating over a normal array as iterating over a array-by-reference. Preferable both loops should show that a foreach has its own array-pointer (method B above) as the documentation clams. Actual result: -------------- EXAMPLE 2: 1,2,3,4,5,6,7,8,9,10 1,3,5,7,9 -- Edit bug report at http://bugs.php.net/?id=33126&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33126&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=33126&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=33126&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=33126&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=33126&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=33126&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=33126&r=needscript Try newer version: http://bugs.php.net/fix.php?id=33126&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=33126&r=support Expected behavior: http://bugs.php.net/fix.php?id=33126&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=33126&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=33126&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=33126&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33126&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=33126&r=dst IIS Stability: http://bugs.php.net/fix.php?id=33126&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=33126&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=33126&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=33126&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=33126&r=mysqlcfg